The Control of Shroud Leakage Flows to Reduce Aerodynamic Losses in a Low Aspect Ratio, Shrouded Axial Flow Turbine

[+] Author and Article Information
A. M. Wallis

Siemens Power Generation U.K. Ltd, C. A. Parsons Works, Newcastle Upon Tyne, United Kingdom

J. D. Denton, A. A. J. Demargne

Whittle Laboratory, Cambridge University, Cambridge, United Kingdom

J. Turbomach 123(2), 334-341 (Feb 01, 2000) (8 pages) doi:10.1115/1.1354143 History: Received February 01, 2000
Copyright © 2001 by ASME
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Jefferson, J. L., 1954, “Some Practical Effects of Tip Clearance in Turbine Blading,” NE Coast Inst. of Engineers and Shipbuilders.
Traupel, W., 1966, Thermische Turbomaschinen, Springer-Verlag, Berlin.
Dawes,  W. N., 1993, “The Practical Application of Solution-Adaption to the Numerical Simulation of Complex Turbomachinery Problems,” Prog. Aerospace Sci., Pergamon Press Ltd., 29, pp. 221–269.
Denton, J. D., and Johnson, C. G., 1976, “An Experimental Study of the Tip Leakage Flow Around Shrouded Turbine Blades,” CEGB Report No R/M/N848, Marchwood Engineering Laboratories.
Denton, J. D., 1993, “Loss Mechanisms in Turbomachines,” ASME Paper No. 93-GT-435.
Wallis, A. M., and Denton, J. D., 1998, “Comparison of Design Intent and Experimental Measurements in a Low Aspect Ratio Axial Flow Turbine With Three-Dimensional Blading,” ASME Paper No. 98-GT-516.
Heidegger, N. J., Hall, E. J., and Delaney, R. A., 1996, “Parameterized Study of High-Speed Compressor Seal Cavity Flow,” AIAA Paper No. 96-2807, 32nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibition.


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The shroud sealing arrangement
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Schematic of model turbine
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Traverse locations in shroud cavity
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Turbine performance characteristics for turning device configurations
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Datum configuration: Velocity profiles in the cavity
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Possible flow structures downstream of the fin
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Rotor 3 exit: Radial variation in tangential velocity
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Configuration 1: Velocity profiles in the cavity
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Schematic of the shroud sealing arrangement (third configuration)
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Configuration 2: Velocity profiles in the cavity
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Configuration 2. Hot-wire traces in the shroud cavity
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Configuration 3: Velocity profiles in the cavity
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Flow structures shroud cavity region



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